And he said the prospect of winning trophies in Super League would be a major attraction.

"It would be a new challenge and one that would be exciting to me as a player, but it's still three years away," he added.

Lockyer said the main difference between the two leagues was the psychological toughness of the players.

"I watch a fair bit of Super League, and it's a game that looks as fast as the NRL, if not quicker, perhaps because the play-the-ball is a bit quicker," he said.

"I think there's a lot of quality players in Super League, and we saw that when Great Britain came over for the Tri-Nations.

"But I think the NRL's main advantage is that every game, every week, is a really tough match.

"You just don't get weeks where you can have an easy game and relax so it hardens you up, physically and mentally.

"You have to front up every week and that's what the NRL is renowned for. With Super League, the top teams might get a few weeks when they have easier games.

"I just think the NRL is a mentally tougher competition. I certainly don't think there's any difference in the skill levels, it's just that we have to perform all the time - and the State of Origin are some of the toughest games you'll ever play in."